CN106896152A - Crack defect area determination method and device - Google Patents
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Abstract
The invention discloses a kind of crack defect area determination method and device, belong to petroleum technology field.The method includes：The impedance data of the corresponding detection coil in region to be detected of pipeline is obtained by the way of EDDY CURRENT；Judge whether impedance data has default defect characteristic；When impedance data has default defect characteristic, determine that region to be detected is crack defect region.The present invention solves the less accurate problem in crack defect region determined, the accuracy in the crack defect region determined is improve, for the determination in crack defect region.
Description
Technical field
The present invention relates to petroleum technology field, more particularly to a kind of crack defect area determination method and device.
Background technology
In petroleum technology field, usually using materials such as pipeline transportation oil or natural gases, but, pipeline is in the mistake for using
The ring inner surface of pipeline is easier to crack defect in journey, accordingly, it would be desirable to the ring inner surface of pipeline is detected, with
Determine the position in crack defect region on pipeline, and then crack defect to crackle defect area is repaired.
In correlation technique, the ring inner surface generally to pipeline by the way of EDDY CURRENT is detected.Example,
When being detected to pipeline, the detection coil of alternating current close to pipeline can will be loaded with, now, the alternation that detection coil is produced
Magnetic field can in the duct induce vortex, be vortexed the magnetic field for producing and change the power in former magnetic field again, and then cause detection coil
Impedance there occurs change, therefore, it can the change of the impedance according to detection coil, determine whether the ring inner surface of pipeline is deposited
In crack defect region.
Because the ring inner surface of pipeline is in addition to crack defect region, it is also possible to there are pit areas and the area that is corroded
Domain, when the ring inner surface to pipeline is detected, pit areas can also influence the impedance of detection coil with the region that is corroded
Change, therefore, the change of the impedance according to detection coil, the crack defect region determined is more inaccurate.
The content of the invention
In order to solve the less accurate problem in crack defect region determined, the invention provides a kind of crack defect area
Domain determines method and device.The technical scheme is as follows：
On the one hand, there is provided a kind of crack defect area determination method, methods described includes：
The impedance data of the corresponding detection coil in region to be detected of pipeline is obtained by the way of EDDY CURRENT；
Judge whether the impedance data has default defect characteristic；
When the impedance data has the default defect characteristic, determine that the region to be detected is crack defect area
Domain.
Optionally, it is described to judge whether the impedance data has default defect characteristic, including：
Determine the corresponding parametric plot of the impedance data, the parametric plot is used to reflect target component with described
The situation of change of test point position in region to be detected；
Judge whether the parametric plot has the default defect characteristic；
When the parametric plot has the default defect characteristic, determine that the impedance data has described default scarce
Fall into feature.
Optionally, the target component includes resistance and inductance, and the parametric plot includes resistance plot and inductance
Curve map,
The resistance plot is used to reflect the resistance of the detection coil with test point position in the region to be detected
Situation of change, the inductance curve figure is used to reflect the inductance of the detection coil with test point position in the region to be detected
The situation of change put.
Optionally, the crack defect region includes：Body crack defect region, bead crack defect area and toe of weld split
Line defect area,
It is described to determine that the region to be detected is crack defect region, including：
When the resistance plot includes a crackle crest, and the inductance curve figure including a crackle trough,
Determine that the region to be detected is body crack defect region；
In weld seam trough, crackle crest and crackle trough that the resistance plot includes arranging successively, and the inductance
When curve map includes weld seam trough, crackle crest, crackle trough, crackle crest and the crackle trough arranged successively, it is determined that described
Region to be detected is bead crack defect area；
Include the weld seam trough arranged successively, crackle crest, toe of weld trough, crackle crest in the resistance plot and split
Ripple paddy, and the inductance curve figure includes the weld seam trough arranged successively, crackle crest, toe of weld trough, crackle crest and splits
During ripple paddy, determine that the region to be detected is toe crack defect area.
Optionally, the region to be detected is located at the ring inner surface of the pipeline.
On the other hand, there is provided a kind of crack defect area determining device, the crack defect area determining device includes：
Acquisition module, the resistance of the corresponding detection coil in region to be detected for obtaining pipeline by the way of EDDY CURRENT
Anti- data；
Judge module, for judging whether the impedance data has default defect characteristic；
Determining module, for when the impedance data has the default defect characteristic, determining the region to be detected
It is crack defect region.
Optionally, the judge module, is additionally operable to：
Determine the corresponding parametric plot of the impedance data, the parametric plot is used to reflect target component with described
The situation of change of test point position in region to be detected；
Judge whether the parametric plot has the default defect characteristic；
When the parametric plot has the default defect characteristic, determine that the impedance data has described default scarce
Fall into feature.
Optionally, the target component includes resistance and inductance, and the parametric plot includes resistance plot and inductance
Curve map,
The resistance plot is used to reflect the resistance of the detection coil with test point position in the region to be detected
Situation of change, the inductance curve figure is used to reflect the inductance of the detection coil with test point position in the region to be detected
The situation of change put.
Optionally, the crack defect region includes：Body crack defect region, bead crack defect area and toe of weld split
Line defect area,
The determining module is additionally operable to：
When the resistance plot includes a crackle crest, and the inductance curve figure including a crackle trough,
Determine that the region to be detected is body crack defect region；
In weld seam trough, crackle crest and crackle trough that the resistance plot includes arranging successively, and the inductance
When curve map includes weld seam trough, crackle crest, crackle trough, crackle crest and the crackle trough arranged successively, it is determined that described
Region to be detected is bead crack defect area；
Include the weld seam trough arranged successively, crackle crest, toe of weld trough, crackle crest in the resistance plot and split
Ripple paddy, and the inductance curve figure includes the weld seam trough arranged successively, crackle crest, toe of weld trough, crackle crest and splits
During ripple paddy, determine that the region to be detected is toe crack defect area.
Optionally, the region to be detected is located at the ring inner surface of the pipeline.
In sum, the invention provides a kind of crack defect area determination method and device, using EDDY CURRENT
Mode is obtained after the impedance data of the corresponding detection coil in region to be detected of pipeline, it is necessary to judge whether is the impedance data that obtains
With default defect characteristic, namely, it is necessary to the feature of the impedance data is compared one by one with default defect characteristic, in impedance data
Feature when including default defect characteristic, just determine the corresponding region to be detected of the impedance data for crack defect region so that
Region (namely pit areas or the region that is corroded) without default defect characteristic will not be mistaken for crack defect region, institute
With, the crack defect region on pipeline can be identified and be determined exactly, improve the crack defect region determined
Accuracy.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the method flow diagram of crack defect area determination method provided in an embodiment of the present invention；
Fig. 2-1 is a kind of corresponding resistance plot in body crack defect region provided in an embodiment of the present invention；
Fig. 2-2 is a kind of corresponding inductance curve figure in body crack defect region provided in an embodiment of the present invention；
Fig. 3-1 is a kind of corresponding resistance plot of bead crack defect area provided in an embodiment of the present invention；
Fig. 3-2 is a kind of corresponding inductance curve figure of bead crack defect area provided in an embodiment of the present invention；
Fig. 4-1 is a kind of corresponding resistance plot of toe crack defect area provided in an embodiment of the present invention；
Fig. 4-2 is a kind of corresponding inductance curve figure of toe crack defect area provided in an embodiment of the present invention；
Fig. 5 is a kind of structural representation of crack defect area determining device provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
As shown in figure 1, the embodiment of the invention provides a kind of crack defect area determination method, the crack defect method can
To include：
Step 101, obtained by the way of EDDY CURRENT pipeline the corresponding detection coil in region to be detected impedance number
According to；
Step 102, judge whether impedance data has default defect characteristic；
Step 103, when impedance data has default defect characteristic, determine that region to be detected is crack defect region.
In sum, in due to crack defect area determination method provided in an embodiment of the present invention, EDDY CURRENT is being used
The mode corresponding detection coil in region to be detected that obtains pipeline impedance data after, it is necessary to judge that the impedance data for obtaining is
It is no with default defect characteristic, namely, it is necessary to the feature of the impedance data is compared one by one with default defect characteristic, in impedance number
According to feature include default defect characteristic when, just determine the corresponding region to be detected of the impedance data for crack defect region, from
Without the region (namely pit areas or the region that is corroded) without default defect characteristic is mistaken for into crack defect region,
Thus it is possible to the crack defect region on pipeline is identified and is determined exactly, the crack defect area for determining is improve
The accuracy in domain.
Example, pipeline can be a diameter of 813 millimeters, and wall thickness is 14 millimeters of pipeline.When step 101 is performed, can
To determine a region to be detected on the pipeline, and the corresponding detection line in region to be detected is obtained by the way of EDDY CURRENT
The impedance data of circle, example, detection coil can be provided with absolute type eddy current sensor probe, EDDY CURRENT can be used
Instrument and absolute type eddy current sensor probe obtain the impedance data in region to be detected.
Further, after impedance data is got, the impedance data that gets can also be filtered, noise reduction and reading
The treatment such as take.Optionally, the region to be detected can be determined in the ring inner surface of the pipeline in a step 101.The ring of pipeline
Inner surface is more hidden, and staff cannot observe with the naked eye the form of the ring inner surface, provided in an embodiment of the present invention
Crack defect area determination method can be carried out effectively to the crack defect region in pipe ring inner surface region to be detected
Identification and judgement, recognize the crack defect region of pipe ring inner surface exactly.
When step 102 is performed, impedance data is extracted in the impedance data that can be got in a step 101, and according to
The impedance data for extracting, determines the corresponding parametric plot in region to be detected, parametric plot be used to reflecting target component with
The situation of change of test point position in region to be detected.
Example, the target component of detection coil can include the resistance of detection coil and the inductance of detection coil, to be checked
Surveying the corresponding parametric plot in region can include the corresponding electricity of the corresponding resistance plot in region to be detected and region to be detected
Sense curve map.Example, the corresponding resistance plot in region to be detected can be used for reflecting the resistance of detection coil with to be detected
The situation of change of test point position in region, the corresponding inductance curve figure in region to be detected can be used for reflecting the electricity of detection coil
Feel with the situation of change of test point position in region to be detected.
When judging whether impedance data meets default defect characteristic, it can be determined that the parametric plot in region to be detected is
It is no with default defect characteristic, when parametric plot has default defect characteristic, it may be determined that the corresponding resistance in region to be detected
Anti- data fit presets defect characteristic.
Specifically, the crack defect region on pipeline can include：Body crack defect region, bead crack defect area
With toe crack defect area.
In a first aspect, when resistance plot includes a crackle crest, and inductance curve figure including a crackle trough,
Can determine that region to be detected is body crack defect region in step 103.Fig. 2-1 is a kind of pipe provided in an embodiment of the present invention
The corresponding resistance plot in body crack defect region, Fig. 2-2 is a kind of body crack defect region provided in an embodiment of the present invention
Corresponding inductance curve figure, as shown in Fig. 2-1, the resistance plot with default defect characteristic includes a crackle crest, such as
Shown in Fig. 2-2, the inductance curve figure with default defect characteristic includes a crackle trough.
Second aspect, in weld seam trough, crackle crest and crackle trough that resistance plot includes arranging successively, and inductance
When curve map includes weld seam trough, crackle crest, crackle trough, crackle crest and the crackle trough arranged successively, in step 103
Can determine that region to be detected is bead crack defect area.Fig. 3-1 lacks for a kind of bead crack provided in an embodiment of the present invention
The corresponding resistance plot in region is fallen into, Fig. 3-2 is a kind of corresponding electricity of bead crack defect area provided in an embodiment of the present invention
Sense curve map, as shown in figure 3-1, the resistance plot with default defect characteristic includes weld seam trough, the crackle arranged successively
Crest and crackle trough, as shown in figure 3-2, the inductance curve figure with default defect characteristic includes the weld seam ripple arranged successively
Paddy, crackle crest, crackle trough, crackle crest and crackle trough.
The third aspect, in weld seam trough, crackle crest, toe of weld trough, crackle ripple that resistance plot includes arranging successively
Peak and crackle trough, and inductance curve figure include arrange successively weld seam trough, crackle crest, toe of weld trough, crackle crest and
Can determine that region to be detected is toe crack defect area during crackle trough, in step 103.Fig. 4-1 is the embodiment of the present invention
A kind of corresponding resistance plot of toe crack defect area for providing, Fig. 4-2 is a kind of toe of weld provided in an embodiment of the present invention
The corresponding inductance curve figure in crack defect region, as shown in Fig. 4-1, the resistance plot with default defect characteristic is included successively
The weld seam trough of arrangement, crackle crest, toe of weld trough, crackle crest and crackle trough, as shown in the Fig. 4-2, with default defect
The inductance curve figure of feature includes weld seam trough, crackle crest, toe of weld trough, crackle crest and the crackle trough arranged successively.
That is, the impedance data in region to be detected can be extracted in a step 102, and determined according to impedance data to be detected
The corresponding resistance plot in region and inductance curve figure.Then the corresponding resistance plot in the region to be detected can successively be judged
Whether there is default defect characteristic with inductance curve figure.In the region to be detected, corresponding resistance plot and inductance curve figure are equal
During with default defect characteristic, step 103 can directly determine that the region to be detected is crack defect region.Further, walk
The feature that can also be had according to resistance plot and inductance curve figure in rapid 103, determine the crack defect region for it is above-mentioned which
Plant crack defect region.
Example, if the corresponding resistance plot in region to be detected includes a crackle crest, and the region pair to be detected
The inductance curve figure answered includes a crackle trough, then it is considered that the region to be detected is body crack defect region.
Further, if judging the impedance data of the detection coil for obtaining region pair to be detected without pre- in step 102
If defect characteristic, then can directly determine that the region to be detected is not crack defect region.
Before step 102, can also determine whether region to be detected is crack like defect region according to impedance data, show
Example, the method in correlation technique can be used to determine whether (present invention is implemented for crack like defect region in the region to be detected
Example in be referred to as crack like defect region, namely the region to be detected in doubtful crack defect region (, if the region to be detected
It is crack like defect region, just continues executing with step 102 and step 103；If region to be detected is not crack like defect region,
Directly determine that the region to be detected is not crack defect region, without execution step 102 and step 103.
In sum, in due to crack defect area determination method provided in an embodiment of the present invention, EDDY CURRENT is being used
Mode obtain after the impedance data of pipeline region to be detected correspondence detection coil, it is necessary to judge whether the impedance data for obtaining has
There is a default defect characteristic, namely, it is necessary to the feature of the impedance data is compared one by one with default defect characteristic, in impedance data
When feature includes default defect characteristic, just determine the corresponding region to be detected of the impedance data for crack defect region, from without
Region (namely pit areas or the region that is corroded) without default defect characteristic can be mistaken for crack defect region, institute
With, the crack defect region on pipeline can be identified and be determined exactly, improve the crack defect region determined
Accuracy.
As shown in figure 5, a kind of crack defect area determining device 50 is the embodiment of the invention provides, the crack defect region
Determining device 50 can include：
Acquisition module 501, the corresponding detection coil in region to be detected for obtaining pipeline by the way of EDDY CURRENT
Impedance data；
Judge module 502, for judging whether impedance data has default defect characteristic；
Determining module 503, for when impedance data has default defect characteristic, determining that region to be detected is crack defect
Region.
In sum, in due to crack defect area determining device provided in an embodiment of the present invention, used in acquisition module
After the mode of EDDY CURRENT obtains the impedance data of the corresponding detection coil in region to be detected of pipeline, judge module needs to judge
Whether the impedance data for obtaining has a default defect characteristic, namely, it is necessary to by the feature of the impedance data and default defect characteristic
Compare one by one, when the feature of impedance data includes default defect characteristic, determining module just determines that the impedance data is corresponding and treats
Detection zone is crack defect region, so as to region (namely the pit areas or rotten of default defect characteristic will not had
Erosion region) crack defect region is mistaken for, thus it is possible to be identified to the crack defect region on pipeline exactly and really
It is fixed, improve the accuracy in the crack defect region determined.
Optionally, judge module 502, are additionally operable to：
Determine the corresponding parametric plot of impedance data, parametric plot is used to reflect target component with region to be detected
The situation of change of test point position；
Judge whether parametric plot has default defect characteristic；
When parametric plot has default defect characteristic, determine that impedance data has default defect characteristic.
Optionally, target component includes resistance and inductance, and parametric plot includes resistance plot and inductance curve figure, electricity
Resistance curve map is used to reflect the resistance of detection coil with the situation of change of test point position in region to be detected, and inductance curve figure is used
In reflection detection coil inductance with test point position in region to be detected situation of change.
Optionally, crack defect region includes：Body crack defect region, bead crack defect area and toe crack lack
Region is fallen into, determining module 503 is additionally operable to：
When resistance plot includes a crackle crest, and inductance curve figure including a crackle trough, determine to be checked
Survey region is body crack defect region；
In weld seam trough, crackle crest and crackle trough that resistance plot includes arranging successively, and inductance curve figure bag
When including weld seam trough, crackle crest, crackle trough, crackle crest and the crackle trough arranged successively, determine that region to be detected is
Bead crack defect area；
In weld seam trough, crackle crest, toe of weld trough, crackle crest and crackle ripple that resistance plot includes arranging successively
Paddy, and inductance curve figure include arrange successively weld seam trough, crackle crest, toe of weld trough, crackle crest and crackle trough when,
Determine that region to be detected is toe crack defect area.
Optionally, region to be detected is located at the ring inner surface of pipeline.
In sum, in due to crack defect area determining device provided in an embodiment of the present invention, used in acquisition module
After the mode of EDDY CURRENT obtains the impedance data of the corresponding detection coil in region to be detected of pipeline, judge module needs to judge
Whether the impedance data for obtaining has a default defect characteristic, namely, it is necessary to by the feature of the impedance data and default defect characteristic
Compare one by one, when the feature of impedance data includes default defect characteristic, determining module just determines that the impedance data is corresponding and treats
Detection zone is crack defect region, so as to region (namely the pit areas or rotten of default defect characteristic will not had
Erosion region) crack defect region is mistaken for, thus it is possible to be identified to the crack defect region on pipeline exactly and really
It is fixed, improve the accuracy in the crack defect region determined.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of crack defect area determination method, it is characterised in that methods described includes：
The impedance data of the corresponding detection coil in region to be detected of pipeline is obtained by the way of EDDY CURRENT；
Judge whether the impedance data has default defect characteristic；
When the impedance data has the default defect characteristic, determine that the region to be detected is crack defect region.
2. method according to claim 1, it is characterised in that described to judge whether the impedance data has default defect
Feature, including：
Determine the corresponding parametric plot of the impedance data, the parametric plot is used to reflect target component with described to be checked
Survey the situation of change of test point position in region；
Judge whether the parametric plot has the default defect characteristic；
When the parametric plot has the default defect characteristic, determine that the impedance data has the default defect special
Levy.
3. method according to claim 2, it is characterised in that the target component includes resistance and inductance, the parameter
Curve map includes resistance plot and inductance curve figure,
The resistance plot is used to reflect the resistance of the detection coil with the change of test point position in the region to be detected
Change situation, the inductance curve figure is used to reflect the inductance of the detection coil with test point position in the region to be detected
Situation of change.
4. method according to claim 3, it is characterised in that the crack defect region includes：Body crack defect area
Domain, bead crack defect area and toe crack defect area,
It is described to determine that the region to be detected is crack defect region, including：
When the resistance plot includes a crackle crest, and the inductance curve figure including a crackle trough, it is determined that
The region to be detected is body crack defect region；
In weld seam trough, crackle crest and crackle trough that the resistance plot includes arranging successively, and the inductance curve
When figure includes weld seam trough, crackle crest, crackle trough, crackle crest and the crackle trough arranged successively, determine described to be checked
Survey region is bead crack defect area；
In weld seam trough, crackle crest, toe of weld trough, crackle crest and crackle ripple that the resistance plot includes arranging successively
Paddy, and the inductance curve figure includes weld seam trough, crackle crest, toe of weld trough, crackle crest and the crackle ripple arranged successively
Gu Shi, determines that the region to be detected is toe crack defect area.
5. method according to claim 1, it is characterised in that the region to be detected is located at table in the ring of the pipeline
Face.
6. a kind of crack defect area determining device, it is characterised in that the crack defect area determining device includes：
Acquisition module, the impedance number of the corresponding detection coil in region to be detected for obtaining pipeline by the way of EDDY CURRENT
According to；
Judge module, for judging whether the impedance data has default defect characteristic；
Determining module, for when the impedance data has the default defect characteristic, determining the region to be detected to split
Line defect area.
7. crack defect area determining device according to claim 6, it is characterised in that the judge module, is additionally operable to：
Determine the corresponding parametric plot of the impedance data, the parametric plot is used to reflect target component with described to be checked
Survey the situation of change of test point position in region；
Judge whether the parametric plot has the default defect characteristic；
When the parametric plot has the default defect characteristic, determine that the impedance data has the default defect special
Levy.
8. crack defect area determining device according to claim 7, it is characterised in that the target component includes resistance
And inductance, the parametric plot include resistance plot and inductance curve figure,
The resistance plot is used to reflect the resistance of the detection coil with the change of test point position in the region to be detected
Change situation, the inductance curve figure is used to reflect the inductance of the detection coil with test point position in the region to be detected
Situation of change.
9. crack defect area determining device according to claim 8, it is characterised in that the crack defect region bag
Include：Body crack defect region, bead crack defect area and toe crack defect area,
The determining module is additionally operable to：
When the resistance plot includes a crackle crest, and the inductance curve figure including a crackle trough, it is determined that
The region to be detected is body crack defect region；
In weld seam trough, crackle crest and crackle trough that the resistance plot includes arranging successively, and the inductance curve
When figure includes weld seam trough, crackle crest, crackle trough, crackle crest and the crackle trough arranged successively, determine described to be checked
Survey region is bead crack defect area；
In weld seam trough, crackle crest, toe of weld trough, crackle crest and crackle ripple that the resistance plot includes arranging successively
Paddy, and the inductance curve figure includes weld seam trough, crackle crest, toe of weld trough, crackle crest and the crackle ripple arranged successively
Gu Shi, determines that the region to be detected is toe crack defect area.
10. crack defect area determining device according to claim 6, it is characterised in that the region to be detected is located at
The ring inner surface of the pipeline.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109406318A (en) * | 2018-11-28 | 2019-03-01 | 武汉科技大学 | A kind of experimental provision and method capturing the toe of weld multiple cracks germinating time and position |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406318A (en) * | 2018-11-28 | 2019-03-01 | 武汉科技大学 | A kind of experimental provision and method capturing the toe of weld multiple cracks germinating time and position |
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